Ase a7 hvac exam graded a - Study guides, Class notes & Summaries

Tech A says that evacuating an AC system will remove air and moisture from the system. Tech B says evacuating an AC system removes dirt particles. Who is right? - ANSWER-A. Evacuating the system removes air and moisture. The receiver drier may contain a filter or strainer to catch and trap foreign particles and dirt, but this remains in the drier and is not removed during evacuation. There is a growling/rumbling noise at the AC compressor when the system is off and the engine is running. The ...